Method for magnetic control electroslag remelting and high-efficiency refining high temperature alloy and device therefor

Abstract

The invention relates to a method for magnetic control electroslag remelting and high-efficiency refining high temperature alloy and a device therefor. The method utilizes electromagnetic shock excitation effect for thinning molten drop and solidification structure, so as to improve the refining effect and reduce segregation. The device comprises a copper mould crystallizer, a water jacket, a high temperature alloy electrode bar, a water-cooled copper plate bottom electrode and a power supply. The invention is characterized in that a magnetic field generator is arranged at the periphery of the water-cooling copper mould crystallizer to generate magnetic field which is compounded with current of electroslag melting, thus generating oscillating lorentz force. The invention is used for electroslag remelting and refining the high temperature alloy, can improve the refining effect and reduce segregation of cast ingot.

Description

technical field [0001] The invention relates to a method and a device for improving the refining effect and reducing ingot segregation in the electroslag remelting process of high-temperature alloys, belonging to the technical field of refining technology. Background technique [0002] The traditional electroslag remelting process is to insert a superalloy electrode made by a common smelting method into a water-cooled crystallizer filled with high-alkaline slag, and use the conductivity of the molten slag to introduce a strong alternating current into the molten slag pool. The current causes the slag to heat up. Under the action of Joule heat, the superalloy electrode gradually melts into molten droplets at the contact end with the slag. During the process of converging and settling in the slag pool, due to the double layer effect and electromagnetic The non-metallic inclusions and impurity elements in the droplet migrate to the surface of the droplet, and then are washed an...

AI Technical Summary

Problems solved by technology

However, how to effectively refine the droplet diameter has not yet proposed a better method

In addition, when the electroslag ingot under the slag pool is solidified, the ingot structure is thick columnar crystals or dendrites growing obliquely upward due to water cooling at the bottom and the surrounding area, and the interdendritic or columnar grain boundary area remains There is obvious grain boundary segregation, so the subsequent plastic deformation or cutting of the electroslag ingot will inevitably cause the composition difference between different regions or cut pieces, which will affect the quality of the formed parts of the subsequent materials

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